Dopamine D1 receptor mutant mice are deficient in striatal expression of dynorphin and in dopamine-mediated behavioral responses

Ming Xu, Rosario Moratalla, Lisa H. Gold, Noboru Hiroi, George F. Koob, Ann M. Graybiel, Susumu Tonegawa

Research output: Contribution to journalArticle

406 Scopus citations

Abstract

The brain dopaminergic system is a critical modulator of basal ganglia function and plasticity. To investigate the contribution of the dopamine D1 receptor to this modulation, we have used gene targeting technology to generate D1 receptor mutant mice. Histological analyses suggested that there are no major changes in general anatomy of the mutant mouse brains, but indicated that the expression of dynorphin is greatly reduced in the striatum and related regions of the basal ganglia. The mutant mice do not respond to the stimulant and suppressive effects of D1 receptor agonists and antagonists, respectively, and they exhibit locomotor hyperactivity. These results suggest that the D1 receptor regulates the neurochemical architecture of the striatum and is critical for the normal expression of motor activity.

Original languageEnglish (US)
Pages (from-to)729-742
Number of pages14
JournalCell
Volume79
Issue number4
DOIs
StatePublished - Nov 18 1994
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

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